A. Dina A. Kennington P. Garrahy A. Chong S. Wahi Echocardiographic probability of PHTN is based upon accurate estimation of the TR jet peak velocity (TR vel). Right ventricular systolic pressure (RVSP) can be calculated [4x(TR vel) 2+Right atrial pressure] as a surrogate for pulmonary artery systolic pressure (PASP). Underestimation of RVSP by transthoracic echocardiography (TTE) may occur due to weak or incomplete TR spectral Doppler signals leading to failed recognition of PHTN.
